A)请先阅读下面短文，掌握其大意，然后从各小题所给的A、B、C、D四个选项中选出可以填入相应空白处的最佳选项。

Hello, I'm John. I'm thirteen and I'm a1 . Now I'm in Class Two. My good friend is Sam. He's my2 , too. We have classes3 Monday to Friday. For me, I like science. I think it's4 . But Sam doesn't like5 . Math is his favorite6 . He thinks it's useful.

Of all the subjects, we really like P. E. , 7 we like playing ball games. It's 8  to do sports! Then 9  do we have P. E. ? Only 10  Wednesday morning and Friday afternoon. So we like these 11  days. 

In my 12 time, I like watching TV and playing basketball. Sam doesn't like watching TV. He thinks it's 13 . And he also thinks watching TV too much isn't good for 14 eyes (眼睛). He's right. On Sunday, Sam always 15 me to do sports. I think he's really a good friend.